Kitchee Cheng Lai Hin signed for
Kitchee when he was only 18. Cheng Lai Hin was one of the torch bearers for Hong Kong for the 2008 Olympic torch relay in the SAR. On 29 November 2008, in the
2008-09 Hong Kong Senior Challenge Shield semi-final, Cheng Lai Hin came on as a substitute and scored Kitchee's second goal, but Kitchee still lost to
Sun Hei SC. On 31 May 2010, in the
2010 Singapore Cup, Cheng Lai Hin scored at the 111-minute, from a
Lo Kwan Yee corner against
Beijing Guoan Talent. His goal helped Kitchee win the match 2:1 and proceed to the quarter finals.
South China On 8 June 2010, Cheng Lai Hin signed for South China in 2010, following the footsteps of
Chan Siu Ki. He left Kitchee because coach
Josep Gombau did not think he fitted Kitchee's 4–3–3 formation. He joined South China expecting to be only a reserve to replace the departing
Chao Pengfei. South China's
Steven Lo compared Cheng favourably to
Jong Tae Se of
North Korea but Cheng himself played down the expectations. In the
2010-11 Hong Kong Senior Challenge Shield semi-final against
Tai Po FC, Cheng Lai Hin scored twice to help South China win 3:0 and advance to the final. In the
2011 Asian Challenge Cup, Cheng Lai Hin came on as a substitute against
Ulsan Hyundai in the third place play-off and scored South China's second goal. But South China lost the match 2:4 to finish last. In the
2011 AFC Cup away game to
East Bengal FC, Cheng Lai Hin scored the second goal for South China, his first goal in the competition, at the 87-minute. The match ended 3:3. In the crucial away leg to
Persipura Jayapura, a
2011 AFC Cup game, Chan Siu Ki was suspended and Cheng Lai Hin was required to partner
Mateja Kezman up front. Kezman claimed he was confident of the partnership with Cheng. But in the end South China lost the match 2:4 and any chance to qualify for the second phase. In his first season at South China, Cheng Lai Hin finished as the top scorer of the club by scoring a total of 7 goals in all local competitions, despite being not a regular starting member, 1 more than
Mateja Kezman and 2 more than regular starter
Chan Siu Ki.
Pegasus Cheng joined
Pegasus in the summer of 2015. ==International career==